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VulnerabilityPublished Updated

CVE-2026-101897: angular · Origin Validation Error

Affects angularSource CVE Database V5

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Not known to be exploited · CVSS 5.1 Medium : upgrade to 22.2.0-rc.0 when convenient.

Data as of 29 Oct 2026, 15:07 UTC

CVSS 4.0 base score
5.1Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (GitHub_M)CVSS 4.05.1
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-10-29.

Patch
Available – fixed in 22.2.0-rc.0, 1.21.1
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:L/SA:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 14 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade angular to 22.2.0-rc.0; angular to 22.2.0-rc.0 or 1.21.1; DevTools to 1.21.1.

Affected software

ProductAffectedFixed in
angularangularAffected
  • <22.2.0-rc.0
Fixed in
  • 22.2.0-rc.0
angularDevToolsAffected
  • >=1.20.0 <1.21.1
Fixed in
  • 1.21.1
npmangularpkg:npm/angularOther threatsAffected
  • <22.2.0-rc.0
  • >=1.20.0 <1.21.1
Fixed in
  • 22.2.0-rc.0
  • 1.21.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Angular DevTools to version 1.21.1 or later, or 22.2.0-rc.0 or later, where the issue is fixed. No other mitigation is required as the vulnerability is resolved in these versions.

Description

A vulnerability in Angular DevTools versions from 1.20.0 up to but not including 1.21.1 allows untrusted web pages or third-party content scripts to send messages to the background service worker without proper origin validation. This can enable an attacker who knows a valid victim tabId to cause the extension to attach the debugger to another browser tab and trigger breakpoints, resulting in JavaScript execution pauses and UI interaction blocks. The issue does not allow remote code execution, privilege escalation, or access to sensitive data. The vulnerability is fixed in Angular versions 1.21.1 and 22.2.0-rc.0.

References

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